I'm using NTL. Only since the router was installed has that message appeared. I find that by taking the router plug out for a minute or so seems to clear the 'limited access' trouble. Similar way I suppose as taking the plug from STB used to boost television email.
There is a chat/forum site
http://www.ntldtv.co.uk/ This was estabilished for the benefit of NTL CWCTV users when they lost Leisure District. Maybe someone there has more specialist knowledge. Not been in for a couple of years,was okay